No Power After Digitizer Replacement

So I have replaced the digitizer on a iPad mini 3 and now there is no power, or sound. I plug it into my computer and nothing. It worked before I replaced the digitizer and now nothing. I have tried to replace the lcd, and replaced the digitizer with another one as well and still nothing.

Ok I was able to get the iPad Pro to power back on but not the iPad mini I plugged it into my computer with 3 different cords with no change, I even tried to put it into DFU mode with no changes. What could have been damaged to cause this

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